Method for injection into a self-clamping mold
US5183605A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 28, 1991 |
| Grant date | Feb 2, 1993 |
| Priority date | — |
| Expiry date | Aug 28, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C45/06
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for injecting molding material into a self-clamping mold. The method comprises the steps of supporting the mold in a support frame clamped in engagement with an injector using a lift mechanism. The pressure required to inject material into the mold is pre-determined and applied by the lifting mechanism to maintain the condition and position of self-clamping mold during injection, and is a function of the area of exposed sprue openings in the mold. The molding material is transferred into the injector. The temperature of the molding material transferred to the mold is controlled, and the molding material is injected into the mold under the pre-determined pressure using the injector, while clamping the mold within the frame with a force of less than 25 tons.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.